Clove oil needs significant dilution before it touches your skin or gums. For topical use on skin, the recommended maximum is 0.5% concentration, which works out to about 1 drop of clove oil per 2 teaspoons of carrier oil. For temporary toothache relief on gums, the standard ratio is 3 to 5 drops of clove oil mixed into 1 teaspoon of carrier oil.
Why Clove Oil Needs More Dilution Than Most Oils
Clove oil is roughly 70 to 90 percent eugenol, the compound responsible for both its numbing effect and its potential to irritate or burn tissue. When eugenol contacts your skin at high concentrations, it can be transformed in the outer layer of skin into reactive compounds that bind to proteins and trigger contact dermatitis. This is why the maximum recommended concentration for clove oil (0.5%) is far lower than the 2 to 3% dilution commonly used for gentler essential oils like lavender or tea tree.
Undiluted clove oil applied directly to skin or gums can cause chemical burns, blistering, and lasting tissue damage. Even a single drop of pure clove oil held against the inside of your cheek can burn the tissue within minutes.
Dilution Ratio for Skin
For any application on the body (sore muscles, joint pain, chest rubs), keep clove oil at or below 0.5%. Here’s what that looks like in practice:
- Per teaspoon of carrier oil: 1 drop of clove oil (this yields roughly 0.5%)
- Per tablespoon of carrier oil: 2 to 3 drops of clove oil
- Per ounce (2 tablespoons) of carrier oil: 5 to 6 drops of clove oil
Good carrier oils for skin application include jojoba, sweet almond, coconut (fractionated stays liquid), and grapeseed oil. All of these absorb well without leaving a heavy residue. Before applying a clove oil blend to a larger area, test a small amount on the inside of your wrist and wait 24 hours to check for redness or irritation.
Dilution Ratio for Toothache Relief
Gum tissue and the inside of your mouth are more sensitive than external skin, so proper dilution matters even more here. Mix 3 to 5 drops of clove oil with 1 teaspoon of an edible carrier oil like olive oil, sweet almond oil, or coconut oil. Dip a clean cotton ball or swab into the mixture and hold it gently against the sore tooth or gum area for up to a minute.
For more widespread mouth discomfort, you can mix a few drops of clove oil into a teaspoon of coconut oil and swish it gently around your mouth, then spit it out. Do not swallow the mixture. Clove oil is not safe to ingest. Swallowing it can cause liver damage, burns to the throat and esophagus, and narrowing of the esophagus over time.
Choosing and Measuring Carrier Oils
A carrier oil is simply a mild, fatty oil that dilutes the essential oil and helps spread it over a larger area. For skin, jojoba and sweet almond are the most popular because they’re lightweight and have little scent of their own. For oral use, stick with food-grade oils you already have in the kitchen: olive oil, coconut oil, or grapeseed oil.
If you don’t have dropper bottles, a standard essential oil bottle with an orifice reducer (the small plastic insert) dispenses drops that are roughly 0.05 mL each. Twenty drops equals about 1 mL. This means 1 drop into a teaspoon (5 mL) of carrier oil gives you close to a 1% dilution. Since clove oil’s maximum is 0.5%, even a single drop per teaspoon puts you near the upper limit.
Clove Oil and Children
Clove oil is not considered safe for children when taken by mouth, even in small amounts. It can cause seizures, liver damage, and dangerous fluid imbalances. For topical skin use on children, the dilution would need to be even lower than the adult 0.5% guideline, and many aromatherapists recommend avoiding clove oil on children entirely in favor of gentler alternatives. As little as 10 milliliters (about 2 teaspoons) of pure clove oil can cause serious toxicity in adults, and the threshold is lower in children.
Who Should Avoid Clove Oil
Eugenol slows blood clotting. If you take blood thinners or have a bleeding disorder, using clove oil (even topically) can increase your risk of bruising and bleeding. Stop using clove oil at least two weeks before any scheduled surgery.
Clove oil can also lower blood sugar, which is a concern if you take diabetes medications. The combination could cause your blood sugar to drop too low. Additionally, eugenol affects how the liver processes a wide range of medications. If you take prescriptions that are broken down by the liver, clove oil could change how those drugs work in your body, making them either stronger or weaker than intended.
Practical Tips for Safe Use
Mix your dilution fresh in small batches rather than making large quantities. Clove oil is potent, and a teaspoon of blended oil is usually more than enough for a single application. Store your clove essential oil in a dark glass bottle away from heat and sunlight to preserve its potency.
If you accidentally get undiluted clove oil on your skin, don’t rinse with water. Water won’t dissolve the oil. Instead, wipe the area with a carrier oil or full-fat milk to lift the essential oil off, then wash with soap and water. For mouth burns from undiluted clove oil, rinse with milk or a carrier oil, spit it out, and avoid eating anything hot or acidic until the tissue heals.
The numbing effect of properly diluted clove oil typically lasts 1 to 2 hours. If you’re using it for a toothache, it’s a temporary measure, not a substitute for dental treatment. Reapplying more than 3 to 4 times per day increases the risk of irritating the tissue you’re trying to soothe.